کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8047428 1519092 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Removal of Acid Green 68:1 from aqueous solutions by calcined and uncalcined layered double hydroxides
ترجمه فارسی عنوان
حذف اسید سبز 68: 1 از محلول های آبی با هیدروکسید دو لایه
کلمات کلیدی
هیدروکسید دو لایه هیدروالکتیت، جذب، رنگ ها، اسید سبز 68: 1، رنگ آمیزی،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
چکیده انگلیسی
Magnesium aluminum layered double hydroxide (LDH) was synthesized by the co-precipitation method followed by calcination. The resulting materials were characterized by X-ray diffraction (PXRD) and attenuated total reflectance with Fourier transform infrared spectroscopy (FTIR/ATR) and simultaneous thermogravimetric analysis/differential scanning calorimetry coupled to mass spectrometry (TGA-DSC-MS). Calcined and non-calcined LDHs were used as adsorbents to remove azo dye Acid Green 68:1 in an aqueous solution. Adsorption experiment results indicated that calcined LDH possesses greater adsorption capacity (154.8 mg g− 1) than non-calcined LDH (99.1 mg g− 1). Isotherms showed that adsorption of the dye was more consistent with the Langmuir model. Kinetic experiments of calcined LDH adsorption showed that for low concentration (50, 100 and 200 mg L− 1), the system reached the adsorption equilibrium in 1, 2, and 4 h, and for higher concentration after 10 h. The best kinetic model was the pseudo-second order. Adsorption studies also showed that the capacity for adsorption of the dye by calcinated LDH does not significantly diminish with pH level variation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volumes 80–81, August 2013, Pages 189-195
نویسندگان
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